Cup packing for pumps and the like



June 19', 1923. P. J. KNOTHE CUP PACKING FOR PUMPS AND THE LIKE Filed 001:. 24 1921 AlVl/E/VTOR I J e BY 24x44 Patented June I19, 11223.

teaser unrrn' srarss'rarsnr orrrceo PAUL J. K1\]OTHE, 015 FORT WAYNE, INDIANA, ASSIGNOR '10 MONTPELIER MANUFAC- .TURI1 TG COMPANY, OF MONTJPELIER, INDIANA, A CORPORATION.

our raomne'roa ruiurs AND THE LIKE.

Application filed October 24, 1921. Serial No. 509,829.

To all whom it may concern: 7

.Be it known that I, PAUL J. KNo'rHE, a citizen of the United States, residing at'Fort Wayne, in the county of Allen and State of Indiana, have invented new and useful Improvements in Cup Packings forPumps and the like, of whichthe following is a specification. y

- The invention relates to cup packings'for pumps, well plungers and the like, and the object of the invention is to construct a cup of the form ordinarily used in pump plungers that it shall have long life and re-- placement of the same on account of wear will be less frequent than heretofore, and a further object is to construct and provide a cup that will resist pressure and abrasion and yet expand so astovretain its efiecti'veness until worn out.

In the accompanying drawings I have illustrated an exemplification of the invention by-which its objects are accomplished and in which drawings 4 a Figure 1 is a plan View of the disk from I which the cup is formed; Fig. 2 a central cross-sectional view of the disk; Fig, 3 a central vertical cross-section of the cup; Fig.

l 4 a plan view of the same and Fi 5 an ex aggerated cross-sectional View 0 the cup showing the different layers of material.

Referring to 'the drawings, the cup is formed from a disk 1 composed of a bottom layer or layers or portion 2 of suitable fab,- ric, such as duck, canvas or the like, impregnated or coated with rubber or a sultable rubber compound, an intermediate portion or layer or layers of fabric 3 which may or may not be coated or impregnated with a suitable adhesive or viscous .material other than rubber such as shellac, and a top portion or layer or layers of rubber coated or impregnated fabric 4:. The several layers may be stitched or sewed together. The

r and take up the wear disk thus formed desired shape of the cup and then cured by sub ectlng it to heat of suitable de ee. It 15 then trimmed up or finished to t e shape shown in Fi ure 3. j Y

The top a er or la ers of rubberized fabric 4 may e omitte in which case the finished cup will have the outer face formed by the rubberized fabric and the innerface formed by the expansive by the. untreated fabric.

The cup thus formed is relatively hard on its outer face which resists wear and cuttlng by sand and grit, while the portion of the cup formed by the untreated fabric or by the fabric-treated with adhesive or viscous material other than rubber, is free to expand-to cause the outer portion to expand on the cup, thus increasing or prolonging the life of the cup veri y materially. Y Y c hat I claim is 1. A cup packing formed of a plurality of layerspf rubberized fabric and intermediate adhesive or viscous material other than rubber.

layers of fabric coated with an 2. A vulcanized cup packing formed of outer and inner layers of rubberized fabric and intermediate layers of a fabric treated with an adhesive or viscous material other than rubber.

3. A vulcanized cup packing formed of outer and inner layers of rubberized fabric and intermediate layers of fabric treated with shellac,

4. A vulcanized cup packing formed of a plurality of layers of fabric, a portion of is then pressed into the.

fabric layers 3. or

said layers being rubberized'and another portion being treated with shellac.

In witness whereof I have hereunto subscribed my name this 21st ,day of October, I

-' PAUL J. KNOTHE. 

